sr

#!/bin/bash

# WildlifeSystems - sensor read
#
# This script provides a standard wrapper for reading sensors in WildlifeSystems,
# and handles inserting the device serial number and timestamp into the JSON response.
#
# This script is part of the WildlifeSystems project. For further information
# please refer to https://docs.wildlife.systems, or for more information on
# the project itself, please refer to https://wildlife.systems.

# Return codes
#
# Further information on WildlifeSystems standard reurn codes can be found
# at https://docs.wildlife.systems/return-codes.html
# 0 - Success
# 2 - no arguments provided

if [[ $# -eq 0 ]]; then
  echo "No arguments supplied"
  exit 2
fi

if [[ $1 == "list" ]]; then
  find /usr/bin -name 'sensor-*' -type f -executable | while read SENS_SCRIPT; do
    # Execute the sensor script with a parameter
    $SENS_SCRIPT identify
    if [[ $? -eq 60 ]]; then
      # If the sensor script returns 60, it is a valid sensor script
      SCRIPT=$(basename $SENS_SCRIPT)
      echo "$SCRIPT"
    fi
  done
  exit 0
fi
SCRIPT=$1

if [[ $# -eq 2 ]]; then
  DEV=$2
else
  DEV="all"
fi

SENS_SCRIPT="sensor-$1"

if [[ $DEV == "list" ]]; then
  $SENS_SCRIPT list
  exit 0
else
  PI_SERIAL=$(grep Serial /proc/cpuinfo | cut -d ' ' -f 2)
  TSTAMP=$(date +%s)

  SENS_JSON=$($SENS_SCRIPT ${DEV})

  # Terminate with error code from sensor script if error thrown
  if [[ $? -ne 0 ]]; then
    if [[ $? -eq 20 ]]; then
      echo "Unknown device"
    fi
    if [[ $? -eq 21 ]]; then
      echo "Unknown sensor"
    fi
    exit $?
  fi

  SENS_JSON=$(echo $SENS_JSON | jq ".[].node_id |= \"${PI_SERIAL}\" | .[].timestamp |= ${TSTAMP}")

  echo $SENS_JSON
fi